Oz Blog News Commentary

Science is horrifying

November 23, 2016 - 10:16 -- Admin

I'm not sure how I'll use the terriftying details of this New Scientist story about the "dinosaur-killing asteroid that turned planet Earth inside-out", but I suspect they'll turn up somewhere in The Cruel Stars.

How could they not?

By analysing the depths and compositions of the rocks, the team reconstructed a timeline for the impact.

First the asteroid blasted through almost all of Earth"s crust, propelling rocks from the bottom of the crust and lifting them 25 kilometres within 10 minutes. At the rim of the newly forming crater, a mountain range higher than the Himalayas lifted and collapsed within three minutes, leaving a halo of basement rock in a geological feature called a peak ring. At the centre, a massive peak of rock splashed upward, fluid-like, before collapsing again - much like the splash of a sugar cube in a cup of hot tea.

About 10 minutes after that, the rocks stabilised and stopped flowing like a liquid. The titanic forces of impact sent shockwaves through the planet and caused earthquakes that would top the 10-point Richter scale, rattling the ground with greater force than any existing fault is capable of producing.